import 'dart:io';
import 'lexicon.dart';

class Config {
  final String telegramToken;
  final Set<int> allowedChatIds;
  final String defaultTopic;
  final int claudeTimeoutSeconds;
  final String mcpConfigPath;

  Config({
    required this.telegramToken,
    required this.allowedChatIds,
    required this.defaultTopic,
    required this.claudeTimeoutSeconds,
    required this.mcpConfigPath,
  });

  factory Config.fromEnv() {
    final e = Platform.environment;
    final allowed = (e['ALLOWED_CHAT_IDS'] ?? '')
        .split(',')
        .map((s) => s.trim())
        .where((s) => s.isNotEmpty)
        .map(int.parse)
        .toSet();

    return Config(
      telegramToken: e['TELEGRAM_BOT_TOKEN'] ?? '',
      allowedChatIds: allowed,
      defaultTopic: e['DEFAULT_TOPIC'] ?? Lexicon.defaultTopic,
      claudeTimeoutSeconds:
          int.tryParse(e['CLAUDE_TIMEOUT_SECONDS'] ?? '600') ?? 600,
      mcpConfigPath: e['MCP_CONFIG_PATH'] ?? '/app/claude-config/mcp.json',
    );
  }
}